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Diets to Avoid: Detoxes, Strict High-Protein Protocols, Mono-Diets

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Diets to Avoid: Detoxes, Strict High-Protein Protocols, Mono-Diets

Every year brings its miracle method. Most share three traits: rapid initial loss, a list of banned foods, and no strategy for what comes afterwards. France's food safety agency (Anses) devoted a collective expert review to the subject that remains the reference work in French, and its conclusions are severe.

What the Anses Review Says

Commissioned by the health ministry, the agency assessed the risks associated with weight-loss eating practices. Its finding: slimming diets followed without professional recommendation or supervision, widely marketed in shops and online, carry health risks ranging from moderate to serious.

The report highlights adverse effects on how the body functions, particularly for bones, the heart and the kidneys, as well as psychological disturbances, notably eating disorders.

On effectiveness, the picture is no better. The agency notes that the weight loss achieved is independent of the type of dietary recommendation and depends solely on the intensity of calorie reduction, and that more than 90% of people regain the weight lost over the evaluation periods studied. Regain affects 80% of cases at one year and 95% at five years.

Three Categories to Set Aside, and Why

1. "Detox" cures. The liver and kidneys continuously eliminate metabolic waste; no juice or infusion replaces them. These programmes rest on severe restriction dressed up as treatment, with initial loss driven largely by water and gut contents. Above all, they entrench the idea that periods of "cleansing" can offset the rest of the year.

2. Strict high-protein protocols. Not to be confused with adequate protein intake, which is actively recommended. What is meant here are sachet-based programmes that exclude whole food groups and run very low energy intakes. They concentrate precisely the kidney, cardiac and bone risks flagged by Anses, and make sense only under strict medical supervision.

3. Mono-diets and exclusion diets. Cabbage soup, pineapple, "free from" this or that food group: the principle is always the same, restriction disguised as a nutritional rule. The deficit comes from monotony, not from any virtue in the food. The risk of deficiencies and later binge eating is high.

Warning Signs of a Dubious Method

  • A specific, fast numerical promise ("lose 10 kg in three weeks"), with no reference to your individual situation.
  • Exclusion of whole food groups without medical indication.
  • Pseudo-medical vocabulary: toxins, acidification, drainage, cellular rebalancing.
  • A tied product: sachets, supplements, meal replacements. The business model is the real objective.
  • No maintenance phase, or a maintenance phase sold separately.
  • Guilt-inducing messaging that attributes failure entirely to your willpower.
  • No identifiable health professional behind the method.

What to Do Instead

Anses is explicit: in health terms, nothing replaces a balanced, varied diet in which daily energy intake does not exceed needs. And to reduce the risk of weight gain, dietary change must be paired with regular physical activity. The agency also reaffirms that weight-loss dieting is not a trivial act and requires personalised follow-up by a health professional.

In practice that means: a moderate deficit, adequate protein, resistance training, sleep, and a maintenance phase planned from the outset. Less marketable, incomparably more effective.

The Takeaway

The problem with fad diets is not that they fail to produce weight loss — they often do in the short term — but that they buy that loss at the wrong price and plan nothing for afterwards. A good programme is judged by what remains twelve months later, not by what it produces in three weeks.

Sources

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